Roger Keyes's approach joined calculated risk, extensive preparation, motivated volunteers, and the principle of using strength or guile as circumstances required. The Atlantic Wall's largest batteries were spaced to engage warships, leaving gaps protected mainly against infantry landings. Commandos could exploit those gaps, including cliffs judged too difficult for a conventional assault, then attack installations or beach positions from behind. Successful missions combined many difficult but achievable tasks rather than depending on superhuman troops.
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Commandos exploited the gaps between heavy coastal batteries
Small, carefully selected commando forces could slip between major batteries and achieve effects that a conventional assault against a fortified port could not.